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Size: 29" H x 40" W Alvin and Co. AEXXXX Ideal for artists, designers, architects, engineers or anyone who needs to store and protect important artwork or documents. Made from heavy-duty .010" crystal-clear vinyl, heat sealed on 3 sides. Designed to fit standard art size sheets and portfolios. Fourth side opens with flap to hold artwork in place and protect against dust, dirt and moisture. Includes acid-free black paper insert. First dimension is opening edge. Packaged and sold by the dozen.